Re: [Xen-devel] [PATCH v3 05/14] xen: arm: implement XEN_DOMCTL_set_address_size

[Julien Grall <julien.grall@xxxxxxxxxx>]

On 11/07/2013 04:44 PM, Ian Campbell wrote:
> This is subarch specific to plumb through to arm32 and arm64 versions.
> 
> The toolstack uses this to select 32- vs 64-bit guests (or rather it does on
> x86 and soon will for arm too).
> 
> I noticed that domctl.c and sysctl.c weren't including xen/hypercall.h to get
> their arch_do_fooctl prototypes, so fix that.
> 
> Signed-off-by: Ian Campbell <ian.campbell@xxxxxxxxxx>
> ---
>  xen/arch/arm/arm32/Makefile     |    1 +
>  xen/arch/arm/arm32/domctl.c     |   35 +++++++++++++++++++++++
>  xen/arch/arm/arm64/Makefile     |    1 +
>  xen/arch/arm/arm64/domctl.c     |   59 
> +++++++++++++++++++++++++++++++++++++++
>  xen/arch/arm/domctl.c           |    7 ++++-
>  xen/arch/arm/sysctl.c           |    1 +
>  xen/include/asm-arm/hypercall.h |    3 ++
>  7 files changed, 106 insertions(+), 1 deletion(-)
>  create mode 100644 xen/arch/arm/arm32/domctl.c
>  create mode 100644 xen/arch/arm/arm64/domctl.c
> 
> diff --git a/xen/arch/arm/arm32/Makefile b/xen/arch/arm/arm32/Makefile
> index aacdcb9..65ecff4 100644
> --- a/xen/arch/arm/arm32/Makefile
> +++ b/xen/arch/arm/arm32/Makefile
> @@ -7,5 +7,6 @@ obj-y += traps.o
>  obj-y += domain.o
>  obj-y += vfp.o
>  obj-y += smpboot.o
> +obj-y += domctl.o
>  
>  obj-$(EARLY_PRINTK) += debug.o
> diff --git a/xen/arch/arm/arm32/domctl.c b/xen/arch/arm/arm32/domctl.c
> new file mode 100644
> index 0000000..c2ca4d3
> --- /dev/null
> +++ b/xen/arch/arm/arm32/domctl.c
> @@ -0,0 +1,35 @@
> +/******************************************************************************
> + * Subarch-specific domctl.c
> + *
> + * Copyright (c) 2013, Citrix Systems
> + */
> +
> +#include <xen/config.h>
> +#include <xen/types.h>
> +#include <xen/lib.h>
> +#include <xen/errno.h>
> +#include <xen/sched.h>
> +#include <xen/hypercall.h>
> +#include <public/domctl.h>
> +
> +long subarch_do_domctl(struct xen_domctl *domctl, struct domain *d,
> +               XEN_GUEST_HANDLE_PARAM(xen_domctl_t) u_domctl)
> +{
> +    switch ( domctl->cmd )
> +    {
> +    case XEN_DOMCTL_set_address_size:
> +        return domctl->u.address_size.size == 32 ? 0 : -EINVAL;
> +    default:
> +        return -ENOSYS;
> +    }
> +}
> +
> +/*
> + * Local variables:
> + * mode: C
> + * c-file-style: "BSD"
> + * c-basic-offset: 4
> + * tab-width: 4
> + * indent-tabs-mode: nil
> + * End:
> + */
> diff --git a/xen/arch/arm/arm64/Makefile b/xen/arch/arm/arm64/Makefile
> index 5d28bad..d2d5875 100644
> --- a/xen/arch/arm/arm64/Makefile
> +++ b/xen/arch/arm/arm64/Makefile
> @@ -6,5 +6,6 @@ obj-y += traps.o
>  obj-y += domain.o
>  obj-y += vfp.o
>  obj-y += smpboot.o
> +obj-y += domctl.o
>  
>  obj-$(EARLY_PRINTK) += debug.o
> diff --git a/xen/arch/arm/arm64/domctl.c b/xen/arch/arm/arm64/domctl.c
> new file mode 100644
> index 0000000..e2b4617
> --- /dev/null
> +++ b/xen/arch/arm/arm64/domctl.c
> @@ -0,0 +1,59 @@
> +/******************************************************************************
> + * Subarch-specific domctl.c
> + *
> + * Copyright (c) 2013, Citrix Systems
> + */
> +
> +#include <xen/config.h>
> +#include <xen/types.h>
> +#include <xen/lib.h>
> +#include <xen/errno.h>
> +#include <xen/sched.h>
> +#include <xen/hypercall.h>
> +#include <public/domctl.h>
> +
> +static long switch_mode(struct domain *d, enum domain_type type)
> +{
> +    if ( d == NULL )
> +        return -EINVAL;
> +    if ( d->tot_pages != 0 )
> +        return -EBUSY;
> +    if ( d->arch.type == type )
> +        return 0;
> +
> +    d->arch.type = type;
> +
> +    return 0;
> +}
> +
> +long subarch_do_domctl(struct xen_domctl *domctl, struct domain *d,
> +                       XEN_GUEST_HANDLE_PARAM(xen_domctl_t) u_domctl)
> +{
> +    switch ( domctl->cmd )
> +    {
> +    case XEN_DOMCTL_set_address_size:
> +        switch ( domctl->u.address_size.size )
> +        {
> +        case 32:
> +            return switch_mode(d, DOMAIN_PV32);
> +        case 64:
> +            return switch_mode(d, DOMAIN_PV64);
> +        default:
> +            return -EINVAL;
> +        }
> +        break;
> +
> +    default:
> +        return -ENOSYS;
> +    }
> +}
> +
> +/*
> + * Local variables:
> + * mode: C
> + * c-file-style: "BSD"
> + * c-basic-offset: 4
> + * tab-width: 4
> + * indent-tabs-mode: nil
> + * End:
> + */
> diff --git a/xen/arch/arm/domctl.c b/xen/arch/arm/domctl.c
> index 851ee40..546e86b 100644
> --- a/xen/arch/arm/domctl.c
> +++ b/xen/arch/arm/domctl.c
> @@ -9,12 +9,17 @@
>  #include <xen/lib.h>
>  #include <xen/errno.h>
>  #include <xen/sched.h>
> +#include <xen/hypercall.h>
>  #include <public/domctl.h>
>  
>  long arch_do_domctl(struct xen_domctl *domctl, struct domain *d,
>                      XEN_GUEST_HANDLE_PARAM(xen_domctl_t) u_domctl)
>  {
> -    return -ENOSYS;
> +    switch ( domctl->cmd )
> +    {
> +    default:
> +        return subarch_do_domctl(domctl, d, u_domctl);
> +    }
>  }
>  
>  void arch_get_info_guest(struct vcpu *v, vcpu_guest_context_u c)
> diff --git a/xen/arch/arm/sysctl.c b/xen/arch/arm/sysctl.c
> index 6388204..98bab6a 100644
> --- a/xen/arch/arm/sysctl.c
> +++ b/xen/arch/arm/sysctl.c
> @@ -10,6 +10,7 @@
>  #include <xen/types.h>
>  #include <xen/lib.h>
>  #include <xen/errno.h>
> +#include <xen/hypercall.h>

I think this line should be in a separate patch.

The other part looks good:
Acked-by: Julien Grall <julien.grall@xxxxxxxxxx>

-- 
Julien Grall

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